Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts
Wednesday, August 5, 2009
Tuesday, August 4, 2009
Science Spelling 1 (11 August 2009)
1) Leaves
2) Roots
3) Stems
4) Flowers
5) Fruits
6) Leaf blade
7) Leaf stalk
8) Leaf veins
9) Chlorophyll
10) Light energy
11) Network veins
12) Parallel veins
2) Roots
3) Stems
4) Flowers
5) Fruits
6) Leaf blade
7) Leaf stalk
8) Leaf veins
9) Chlorophyll
10) Light energy
11) Network veins
12) Parallel veins
Monday, July 13, 2009
Mirror Coating
Hi Rainbows,
Do you remember the question Si Ting posed in class today? She said that the mirror was a little attracted to the table's metal rod? This is what I found out:
Research from here:
Glass mirrors are most often coated with non-toxic silver or aluminium, implemented by a series of coatings:
1) tin
2) silver
3) chemical activator
4) copper
5) paint
The tin is applied because silver will not bond with the glass. The activator causes the tin/silver to harden. Copper is added for long-term durability. The paint protects the coating on the back of the mirror from scratches and other accidental damage.
The mirrors we had in class had perhaps some magnetic material mixed in it. Therefore, our mirrors were attracted to the metal rods!
Do you remember the question Si Ting posed in class today? She said that the mirror was a little attracted to the table's metal rod? This is what I found out:
Research from here:
Glass mirrors are most often coated with non-toxic silver or aluminium, implemented by a series of coatings:
1) tin
2) silver
3) chemical activator
4) copper
5) paint
The tin is applied because silver will not bond with the glass. The activator causes the tin/silver to harden. Copper is added for long-term durability. The paint protects the coating on the back of the mirror from scratches and other accidental damage.
The mirrors we had in class had perhaps some magnetic material mixed in it. Therefore, our mirrors were attracted to the metal rods!
Sunday, May 10, 2009
Monday, April 20, 2009
Human Body
New Human Body website added to 'Our Rainbow Sites' section located on the right of our blog!
Click on pic!
Monday, February 2, 2009
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